Well, NBA official Pat Fraher ruled it a jump ball, while crew chief Ken Mauer signaled for a foul. It ended up as a common foul.

To explain the whole fiasco, NBA Senior Vice President Joe Borgia joined TNT.

.@NBA's Joe Borgia joins #InsideTheNBA to explain the wild sequence of events that took place between Lance Stephenson & Jeff Green during the final 10 seconds of play during Cavs-Pacers Game 4: pic.twitter.com/3h0fDp3iND

“On the court, you can see Kenny Mauer come up with his fist up,” Borgia said. “So he has a foul on Stephenson for the headlock. They went to the ground and obviously, they rolled over. A little pushing.

“They came to replay to see if–after the foul that was called on the court–there was any hostile acts that a technical foul needed to be called. And when they go to the floor, they just roll around. No punches thrown, nobody pushes anybody, so they did not have any penalty except for the personal foul of Lance–basicall,y the headlock which was prior to the hands on the ball. That’s what they stayed with.”

Furthermore concerning the call itself, the NBA rulebook states that if there are two separate calls in a jump ball situation, the foul call overrides the other ruling.

Also – when one referee on the floor calls a foul and the other calls a jump ball (which is what happened here), Borgia says the NBA rulebook states the foul call takes precedence.